Verizon customers gabbing it up, texting away or surfing the web at the Indianapolis Motor Speedway this month should be able to find a strong signal.

The nation's largest wireless communications company has upped its technical presence at the track by adding 200 antennas and supporting gear in grandstands and suites and another 35 temporary antennas on scoreboards. The system featured a mere 29 antennas last year.

The upgrades took nearly a year to put in place and should provide a 250-percent increase in capacity to its high-speed wireless service at the track, Verizon said.

The improvements aim at "ensuring a winning experience for fans," said Verizon. The test of the new system will come May 25 when some 300,000 people will descend on the track for the 500-Mile-Race.

For publicity's sake, the wireless provider can ill afford a communications snafu at the Speedway (imagine 100,000 race fans saying, "Can you hear me?") since it's the title sponsor of the IndyCar Series.

Verizon didn't reveal a cost for the track improvements. The New York-based telecommunications giant said it's spent $1.5 billion on its Indiana wireless network since 2000, including $130 million in improvements last year alone.